Earth-moving scraper bowl lift arrangement



Sept- 23, 1958 L. KlRcHLER l-:rAL

EARTH-MOVING SCRAER BOWL LIFT ARRNGEMENT Filed April 26, 1956 United States Patent O EARTH-MOVING SCRAPER BOWL LIFT GEMENT Lewis Kirchler, Chicago, and Vernon E. Rezabek,

Berwyn, Ill., assignors to International Harvester Company, a corporation of New Jersey Application April 26, 1956, Serial No. 580,873

12 Claims. (Cl. 237-126) This invention relates to earth-moving equipment and more particularly to an improved lifting arrangement for a scraper bowl.

The conventional earth-moving scraper generally comprises a scraper bowl which is suitably carried and pivoted on rear wheels. A wheeled draft frame is positioned in front of the bowl and is pivotally connected to said bowl, the said draft frame generally comprising a relatively high gooseneck construction on which various reeving pulleys are mounted. The high construction of the gooseneck draft frame is generally necessary to permit suiicient degrees of raising and lowering of the scraper bowl to accommodate the different conditions under which the scraper operates. The relatively high gooseneck draft frame, however, has the disadvantage of providing a relatively high center of gravity for the unit which is highly undesirable in equipment of this type where large amounts of earth must be handled under uneven and rugged working terrain. Furthermore, the generally high level gooseneck draft frame construction presents a silhouette, in side view, which is undesirable from an esthetic as well as functional standpoint. In addition, a high level draft frame has the additional disadvantages of adding additional weight to the scraper unit at a location where such additional weight is not desired. It is a prime object of this invention, therefore, to provide `an improved low center gravity scraper having a lifting arrangement permitting increased bowl raising and lowering limits.

Still another object isv to provide an improved earthworking scraper having a relatively low height draft frame construction.

A still further object is to provide an improved lifting arrangement for a scraper bowl, the arrangement permitting maximum lifting operation with the incorporation of a relatively low height draft frame construction.

A still more specific object is the provision of a scraper bowl having a draft frame connected thereto, the draft frame incorporating a transversely extending tubular member designed to accommodate an improved lifting arrangement for the scraper bowl which permits improved lifting and lowering of the bowl.

Another object of the invention is the provision of an improved draft frame for scraper bowls, the said draft frame including a transversely extending tubular member adapted to support a plurality of reeving pulleys and sheaves designed to permit high level lift of the scraper bowl while maintaining a relatively low height draft frame construction.

These` and other objects will become more readily apparent from a reading of the specification when eX- amined in connection with the accompanying sheets of` drawings.

Figure l is a side elevational view of a scraper having a bowl and draft frame construction, the bowl being shown in Various raised and lowered positions;

Figure 2 is a fragmentary plan view taken substantially along the line 2 2 of Figure l; and

2,852,871 Patented Sept. 23, 1958 ICC Figure 3 is an enlarged cross-sectional View through a portion of a lifting frame of a scraper, the said View being taken particularly along the line 3-3 of lFigure 2.

Referring now to Figure 1, an earth-moving scraper is generally designated by the reference character 10. The scraper 10 comprises a pair of transversely spaced bowl frame members 11 having a scraper bowl generally designated at 12 connected thereto. The bowl 12 is supported at its rear by laterally spaced ground wheels 13 which also support a bumper construction 14. The forward end of the bowl is provided with a pair of laterally spaced apron arms 15 to which a bowl apron 15 is connected. The apron 15 is conventionally pivoted by means of the arms 15 as indicated generally at 16.

A laterally extending hollow or tubular draft frame member 17 is rigidly'connected to laterally spaced arms 19 which straddle the bowl and are suitably pivotally connected by means of brackets 20, only one of which is shown, to the transversely spaced frame members 1,1. The lateral tubular frame member 17 is rigidly secured to a gooseneck draft frame or support designated at 23. The draft frame 23 includes a pair of converging frame members 24 connected to downwardly extending pedestal members 25. A pair of laterally spaced beams 26'are connected to the draft member 17 at their rea'rmost ends and are connected to the members 24 at their forward ends.

The beams 26 may have their ends suitably fastened to the lateral member 17 and to the frame members 24 by welding or other means. 26 are disposed well below the upper edges of the frame members 24 to permit the sheaves of a lifting arrangement to nest between and substantially below the upper edges of the frame members 24 as will be described below. Ground wheels 27 connected to the` pedestal members 25 suitably support the draft frame 23.

A bowl lifting arrangement is generally indicated at 30. The lifting arrangement 30 comprises a pair `of laterally spaced reeving sheaves 31 which are rotatably connected to brackets 32 suitably connected to and supported on the transverse member 17. The member 17 is provided with transversely spaced upper slots 33 which are in alignment with a pair of laterally spaced lower slots 34 provided in the said member 17. Outer sheave supports 35 are rigidly connected. to the transverse member 17, the connection being best shown in Figure 3. Each of the outer sheave supports 35 supports an outer sheave bracket 36. Each outer sheave bracket 36 consists of laterally spaced plates 36 which are connected at their upper ends to a hanger 37 suitably supported on a shaft 38 which is supported at its opposite ends by means of end plates 39 connected to the ends of the outer sheave supports 35. Only one of the end plates 39 is shown in Figure 3, the other end plate of each support 35 being shown in Figure 2. The outer sheave brackets 36 each have supported thereon a shaft 40 on which an outer sheave 41 is mounted.

As best shown in Figure 2, a movable sheave 42 has connected thereto a cable 43, the cable extending from -the movable sheave 42 around lthe reeving sheaves 31 to the outer sheave 41 and thence downwardly through the slots 34, and around guides 44 positioned on opposite sides of the bowl 12. The ends of the cable 43 are then suitably connected to cinch blocks 45, one of which is positioned on each side of the scraper bowl 12.

Significantly the beams mltiple movable sheaveblock 46 which supports a shaft 47. vA plurality-of sheaves 48 are rotatably journaled on the shaft 47. A stationary multiple sheave arrangement 49 is suitably connected by means of a shaft550 to the convergingmembers 24. The shaft 50 rotatably lsupports aJplurality ofsheaves 51. A rela- -tively thinner cable 52 has-one end (not shown) connectedA to the stationary sheave arrangement 49 and is loop'e'd'abo'ut the sheaves 48 and 51, the said cable 52 also `being connected to a guide sheave 53 suitably supported by means of a bracket 54to the draft frame 23. It is of significance thatthe movable and stationary sheave arrangement aboveA described, as well as the cable 52, are disposed between the converging members 24 and substantially below the upper edges of said members. The sheave block 46 also issupported, in sliding arrangementloii theb'eams 26. Thus the movable and stationary sheavel arrangerrientisV substantially hidden in side elevation, the appearance of the unit is enhanced, the movable vand stationary sheaves are protected during operation', and-a lower'- center of gravity is achieved. l The scraper'lZ may be of conventional construction including the cutting yblade 55, spare cable reels 56 and lan ejector gate 57.

to a source of power whereupon tensioning of the said cable 52 causes thermovable sheave block 46 to be drawn toward the stationary sheave arrangement 49. This-causes the cable 43 to .raise the bowl 12 to the desired height. Slackening of the cable 52, of course, causes movement of the sheave block 46 in an opposite direction whereby the bowl 12 is lowered by gravity.

The novel arrangement of the reeving sheaves and fairlead sheaves, the latter being located within the tubular member, permits the bowl draft frame to have a relatively low height construction yet permitting the bowl toV be raised to the desired height. Since the ends of the -cable 43 are connected to a lower portion of the front end-of the bowl 12, increased raising height is possible. Raising or lowering of the bowl 43, of course, causes changes in the angular position of portions of kthecable 43 which extends in a vertical direction. This .angular change -is compensated for by means of the angularly shiftablel outer sheave bracket 36 and its pivotal' relation with respect to the shaftr38. Each of the lower slots 34 are also constructed suiciently large to accommodate this change in angularity as best indicated -inlFigure 3, It is contemplated, of course, that the outer sheave brackets 36 may be -fixed against angular shifting movement, such angular adjustment not being necessary in-all arrangements.

-Thus-it is obvious that a relatively low cent-er Vgravity 'draft frame and bowl construction has been described. The ltransverse tubular vmember provides a rigid and -strong construction which suitably supports the sheave and cable arrangement so that a high lift is still a result though the draft frame height is kept at a minimum. By the disposition of the fairlead brackets and lsheaves within the tubular member, a low silhouette frame and bowl construction can be accomplished.

Thus the objects have been fully achieved and it must be understood that changes and modifications may be made without departing from the spirit of the invention as disclosed or the scope thereof as defined in the appended claims.

What is claimed is:

Vl. An earth-moving scraper comprising a pair of laterally spaced bowl framemembers, a scraper bowl sup- .ported on said frame members, a scraper blade connected to a forward portion o-f said bowl, rear ground wheels connected to a rear portion ofthe frame for supporting said bowl, a draft frame disposed forwardly of said bowl, said draft frame including a laterally extending tubular draft member having laterally spaced upper and lower vertically aligned slots', laterally spaced draft arms connected to said tubular draft member on opposite sides of said bowl, means pivotally connecting said arms to said bowl, a gooseneck support connected to said tubular draft member, front ground wheels associated with said gooseneck support for supporting said draft frame; a lifting arrangement for said bowl comprising a pair of inner reeving sheaves rotatably supported in laterally spaced relation on theV upper portion of said tubular draft member for rotating movement about vertical axes, outer sheave supports supported on said draft member above said aligned slots, outer sheave brackets pivotally connected to the outer sheave supports for swinging movement about axes generally parallel to said tubular draft member, said outer sheave brackets being disposed within said tubular draft member, outer sheaves rotatably supported on said outer brackets for rotation about axes laterally of said tubular draft memberl a multipie movable sheave block, a movable sheave supported on said block for rotating movement about a vertical axis, a first cable having a loop connected to the movable sheave, said cable having cable portions extending in reeving arrangement horizontallyV around said reeving Isheaves to said Outer sheaves and downwardly through said lower slots, means connecting the opposite ends of said first cable to lower portions of said bowl a rigid sheave block supported by said gooseneck support, first and second groups of multiple sheaves respectively .supported on said blocks, and aA second cable connecting said multiple sheaves, said second cable being adapted to connect to cable control means whereby during movement of said second cable in 'one direction `said movable block is moved toward said rigid block and said movable sheave moves said iirst cable to raise said scraper bowl.

2. An earth-moving scraper comprising a pair of laterally spaced bowl frame members, a scraper bowl supported on said frame members, a scraper blade connected to said bowl, rear ground wheels for supporting said bowl, a draft frame disposed forwardly of said bowl, said draft frame including a laterally extending tubular draft member having laterally spaced upper and lower vertically aligned slots, laterally spaced draft arms connected to said tubular draft member on opposite sides of said bowl and being pivotally connected thereto, a gooseneck support connected to said tubular draft member, front ground wheels associated with said gooseneck support for supporting said draft frame; a lifting arrangement for said bowl comprising a pair of reeving sheaves rotatably supported in laterally spaced relation on said tubular draft member for rotating movement about vertical axes, outer sheave supports supported on said draft member above said aligned slots, outer sheave brackets pivotally connected to the outer supports for swinging movement about 'axes generally parallel to said tubular draft member, said outer brackets being disposed within said tubular draft member, outer sheaves rotatably supported on said outer brackets for rotation about axes transversely of said tubular draft member, a multiple movable sheave block, a movable sheave supported on said block for rotating movement about a vertical axis, a rst cable having a loop connected to the movable sheave, said vcable having cable portions extending in reeving arrangement horizontally around said reeving sheaves to said outer sheaves and downwardly through Isaid lower slots, means connecting the opposite ends of said iirst cable to lower portions 'of said bowl, a rigid sheave block supported by said gooseneck support, rst and second groups of multiple sheaves respectively supported on said blocks,

andy/a second cable connecting said multiple sheaves, said v:cable to 'raise said' scraper bowl.

3. An earth-moving scraper comprising a scraper bowl, a scraper blade connected to said bowl, rear ground Wheels connected to said bowl, a draft frame disposed forwardly of said bowl, said draft frame including a laterally extending tubular draft memberhaving laterally spaced upper and lower vertically aligned slots, laterally spaced draft arms connected to said tubular draft member and pivotally connected to opposite sides of said bowl, a support connected to said tubular draft member, front ground Wheels associated with said support for supporting said draft frame; a lifting arrangement for said bowl comprising a pair of reeving sheaves rotatably supported in laterally spaced relation on said tubular draft member for rotating movement about vertical axes, outer supports supported on said draft member, outer brackets pivotally connected to the outer supports for swinging movement about axes generally parallel to said tubular draft member, said outer brackets being disposed within said tubular draft member, outer sheaves rotatably supported on said outer brackets for rotation about axes transversely of said tubular draft member, a multiple movable sheave block, a movable sheave supported on said block for movement therewith for rotating movement about a vertical axis, a first cable connected to the movable sheave, said cable having cable portions extending in reeving arrangement horizontally around said reeving sheaves to said outer sheaves and downwardly through said lower slots, means connecting the opposite ends of said first cable to lower portions of said bowl, a rigid sheave block supported by said support, first and second groups of multiple sheaves respectively supported on said blocks, and a second cable connecting said multiple sheaves, said second cable being adapted to connect to cable control means whereby during movement of said second cable in one direction said movable block is moved toward said rigid block and said movable sheave moves said first cable to -raise said scraper bowl.

4. An earth-moving scraper comprising a scraper bowl, rear ground wheels connected to said bowl, a draft frame disposed forwardly of said bowl, said draft frame including a laterally extending tubular draft member having laterally spaced upper and lower vertically aligned slots, laterally spaced draft arms connected to said tubular draft member on opposite sides of said bowl, means pivotally connecting said arms to said bowl, a support connected to said tubular draft member, front ground wheels associated with said support for supporting said draft frame; a lifting arrangement for said bowl comprising a pair of reeving sheaves rotatably supported on the tubular draft member for rotating movement about vertical axes, outer supports supported on said draft member adjacent said slots, outer brackets pivotally connected to the outer supports for swinging movement about axes generally parallel to said tubular draft member, said outer brackets being disposed within said tubular draft member, outer sheaves rotatably supported on said outer brackets for rotation about axes transversely of said tubular draft member, a multiple movable sheave block, a movable sheave supported on said block for rotating movement about a vertical axis, a first cable connected to the movable sheave, said cable having/ cable portions extending in reeving arrangement horizontally around said reeving sheaves to said outer sheaves and downwardly through said lower slots, means connecting the opposite ends of said rst cable to lowerportions of said bowl, a rigid sheave block supported by said support, first and second groups of multiple sheaves respectively supported on said blocks, and a second cable connecting said multiple sheaves, said second cable being adapted to connect to cable control means whereby during movement of said second cable in one direction said movable block is moved toward said rigid block and said movable sheave moves said first cable to raise said scraper bowl.

5. An earth-moving scraper comprising a scraper bowl, ground wheels connected to said bowl, a draft frame for said bowl, said draft frame including a laterally extending tubular draft member having laterally spacedupper and lower vertically aligned slots, laterally spaced draft arms connected to said tubular draft member and pivotally connected to said bowl; a lifting arrangement for said bowl comprising a pair of reeving sheaves rotatably supported in laterally spaced relation on the upper portion of said tubular draft member for rotating movement about vertical axes, outer brackets supported within said draft member adjacent said aligned slots, outer sheaves rotatably supported on said outer brackets for rotation about axes transversely of said tubular draft member, a movable sheave adjacent said draft member, a cable connected to the movable sheave, said cable having cable portions extending in reeving arrangement around said reeving sheaves to said outer sheaves and downwardly through said lower slots, means connecting the opposite ends of said cable to lower portions of said bowl, and movable means connected to said movable sheave to move the same whereby said cable is moved to raise and lower said bowl.

6. An earth-moving scraper comprising a scraper bowl, ground wheels connected to said bowl for supporting said bowl, a draft frame, said draft frame including a transversely extending tubular draft member having transversely spaced upper and lower openings, means pivotally connecting said draft frame to said bowl, a lifting arrangement for said bowl `comprising a pair of reeving sheaves rotatably supported in laterally spaced relation on the upper portion of said tubular draft member for rotating movement, outer brackets pivotally connected to said tubulardraft member for swinging movement -about axes generally parallel to said tubular draft member, outer sheaves rotatably supported on said outer brackets, a movable sheave supported adjacent said draft member, a cable connected to the movable sheave, said cable having cable portions extending in reeving arrangement around said reeving sheaves to said outer sheaves and downwardly through said lower openings, means connecting the opposite ends of said cable to said bowl, and means connected to said movable sheave for moving the same whereby said cable raises and lowers said bowl.

7. An earth-moving scraper comprising a scraper bowl, wheels supporting said bowl, a draft frame connected to said bowl, said draft frame including a tubular draft member extending laterally of and being pivotally connected to said bowl, lifting means for said bowl including cable reeving members supported on said draft member, said draft member having laterally spaced upper and lower openings, outer sheave brackets supported within said draft member, a sheave rotatably supported on each bracket, a cable having end portions connected to said bowl, said cable extending upwardly through said lower openings and engaging said outer sheaves and extending through said upper openings and engaging said cable reeving members, a movable sheave adjacent said cable reeving members, a loop portion on said cable engaging said movable sheave, and means for moving said movable sheave toward and away from said draft member thereby moving said cable and lowering and raising said bowl.

8. An earth-moving scraper in accordance with claim 7, said means for moving said movable sheave including a second cable adapted to be connected to a source of power.

9. An earth-moving scraper in accordance with claim 7, said means for moving said movable sheave including movable and stationary sheave blocks each having a plurality of equalizing sheaves connected thereto, means connecting the movable block to said movable sheave, means connecting the stationary block to said draft frame, and a second cable connected to said equalizing sheaves, said cable being adapted to be connected to a source of power whereby said movable block may be moved to move said movable sheave and said first-mentined cable to raise and lower said bowl.

1 0. n earth-moving scraper comprising a scraper bowl, ground wheels supporting the rear portion of Vsaid bowl, a wheeled draft frame connected to the bowl to support the forward portion thereof, said draft frame comprising a laterally eXtending tubular draft member, draft arms on said draft member pivotally connected to said bowl, a gooseneck support including laterally spaced frame members connected to said tubular draft member, a supporting beam supported at one end by said tubular draft member and at its other end by said frame members, said supporting beam being disposed below the upper edges of said frame members; lifting means for said bowl comprising outer sheaves' rotatably supported Within said tubular member, first cable means connected to said sheaves and to said bowl, and second cable means adapted to be connected to a source of power, said second cable means lbeing connected to said first cable means for moving the same to raise and lower said bowl, said `second cable means being disposed between the frame members, and being substantially disposed below the upper edges thereof.

11. An earth-moving scraper comprising a scraper bowl, a wheeled draft frame connected to the bowl, said draft frame comprising a laterally extending tubular draft member, draft arms on said draft member pivotally connected to said bowl, a gooseneck support including laterally spaced frame members connected to said tubular draft member, supporting means supported between said frame members, said 4supporting means being dis posed below the upper edges of said frame members; lifting means for said bowl comprising outer sheaves rotatably supported within said tubular member, first cable means connected to said sheaves and to said bowl, and second cable means adapted to be connected to a source of power, said second cable means being connected to said first cable means for moving the same to raise and lower saidbowl, said second cable means being disposed between the frame members, and being substantially disposed below the upper edges thereof.

12. An` earth-moving scraper comprising a scraper bowl, a wheeled draft frame connected to the bowl, said draft frame comprising a laterally extending tubular draft member, draft arms on said draft member pivotally connected to said bowl, `a gooseneck support including laterally spaced frame members connected to said tubular draft member; lifting means for said bowl comprising outer sheaves rotatably supported within said tubular member, first cable means connected to said sheaves arid to said bowl, and second cable means adapted to be connected to a source of power, said second cable means being connected to said first cable means for moving the same to raise and lower said bowl, said second cable means being disposed between the frame members, and being substantially disposed below the upper edges thereof.

References Cited in the file of this patent UNITED STATES PATENTS Nichols, July 1955, pages 17-2., 17-3 and 17-5. Northcastle Books, publisher, Greenwich, Conn. 

